Regression: Import of Blender exported binary FBX 7.4 file with at least one animation crashes editor

Importing a binary FBX 7.4 file that was exported in Blender, which contains at least one animation makes the editor hang at 75% of the progress bar for about 1 to 2 seconds before it crashes. That didn’t happen with Unreal Engine 4.12.5.

Exporting from Blender as FBX ASCII 6.1 doesn’t cause a crash upon importing into the unreal editor, but doesn’t import the animation.

Caveat: At a first glance, the console output suggests the issue might be happening during mesh triangulation. However, pre-triangulated meshes crash as well, with the last operation instead being related to material processing in that case. It’s possible the console output might be a bit misleading in that regard.

**Already existing reports on the issue: **




  • Hardware: AMD Phenom II 955, 780 Ti (proprietary driver: 370.28), 12 GB RAM
  • Operating System: Linux (Ubuntu 16.04; kernel 4.4.0-64-lowlatency); fluxbox window manager; tested with and without compton.
  • Build: Self compiled on the same system using clang 3.6.2.
  • Blender versions: 2.77a, 2.78b

Hey Aziroshin-

I opened the project you provided and imported the fbxanimations_7.4.fbx file into the project. There was no crash for me when “Import Animations” was selected and I clicked the Import All button. Can you provide the reproduction steps that cause the crash for you as well as the callstack and log files from the crash?

Hey Aziroshin-

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.